Free 1Z0-821 Exam Dumps Preview

The Internet Control Message Protocol (ICMP) is one of the core protocols of the Internet Protocol Suite.
ICMP differs from transport protocols such as TCP and UDP in that it is not typically used to exchange data between systems, nor is it regularly employed by end-user network applications (with the exception of some diagnostic tools like ping and traceroute).

Enable-if -t interface Enables the given interface by reading the configuration from the persistent store. All the persistent interface properties, if any, are applied and all the persistent addresses, if any, on the given interface will be enabled.
-t, --temporary

Specifies that the enable is temporary and changes apply only to the active configuration.

Starting with the Oracle Solaris 11 Express release, Fast Reboot is supported on the SPARC platform, as well as the x86 platform. On both platforms, this feature is controlled by the SMF and implemented through a boot configuration service, svc:/system/boot-config. The boot-config service provides a means for setting or changing the default boot configuration parameters.

The fastreboot_default property of the boot-config service enables an automatic fast reboot of the system when either the reboot or the init 6 command is used. When the config/fastreboot_default property is set to true the system automatically performs a fast reboot, without the need to use the reboot -f command. By default, this property's value is set to false on the SPARC platform and to true on the x86 platform.

This procedure causes the system to generate an email notification each time one of the services or a selected service has a change in state. You can choose to use either SMTP or SNMP. Normally, you would only select SNMP if you already have SNMP configured for some other reason.

By default, SNMP traps are sent on maintenance transitions. If you use SNMP for monitoring, you can configure additional traps for other state transitions.

1. Become an administrator or assume a role that includes the Service Management rights profile.
2. Set notification parameters.

Example:
The following command creates a notification that sends email when transactions go into the maintenance state
# /usr/sbin/svccfg setnotify -g maintenance mailto:[email protected]

Note: # route -p add -host destination-IP gateway-IP -static where destination-IP and gateway-IP are IPv4 addresses of the host to be used as a target.

For example, you would type the following to specify the target system 192.168.10.137, which is on the same subnet as the interfaces in IPMP group itops0:

$ route -p add -host 192.168.10.137 192.168.10.137 -static This new route will be automatically configured every time the system is restarted. If you want to define only a temporary route to a target system for probe-based failure detection, then do not use the -p option.

You can use the pgrep and pkill commands to identify and stop command processes that you no longer want to run. These commands are useful when you mistakenly start a process that takes a long time to run.

To terminate a process:

Type pgrep to find out the PID(s) for the process(es).

Type pkill followed by the PID(s).

You can kill any process that you own. Superuser can kill any process in the system except for those processes with process IDs of 0, 1, 2, 3, and 4. Killing these processes most likely will crash the system.

http://www.oracle.com/technetwork/server-storage/solaris11/overview/solaris-matrix-
1549264.html

Image properties described below.

* be-policy
Specifies when a boot environment is created during packaging operations. The following values are allowed:
/ default
Apply the default BE creation policy: create-backup.

/ always-new (D, F)
Require a reboot for all package operations (D) by performing them in a new BE set as active on the next boot (F). A backup BE is not created unless explicitly requested. This policy is the safest, but is more strict than most sites need since no packages can be added without a reboot.

ZFS Deduplication Property
Solaris Express Community Edition, build 129: In this Solaris release, you can use the deduplication property to remove redundant data from your ZFS file systems. If a file system has the dedup property enabled, duplicate data blocks are removed synchronously. The result is that only unique data is stored and common components are shared between files.

You can enable this property as follows: # zfs set dedup=on tank/home

By default, the pkg info command only lists information about installed packages on the system; however, we can use a similar command to look up information about uninstalled packages, as shown in here: Example: Listing Information About an Uninstalled Package
# pkg info -r php-52
Name: web/php-52
Summary: PHP Server 5.2
Description: PHP Server 5.2
Category: Development/PHP
State: Not Installed
Publisher: solaris
Version: 5.2.17
Build Release: 5.11
Branch: 0.175.0.0.0.1.530
Packaging Date: Wed Oct 12 14:01:41 2011
Size: 44.47 MB
FMRI: pkg://solaris/web/[email protected], 5.11-0.175.0.0.0.1.530:20111012T140141Z

Note: pkg info command displays information about packages in a human-readable form. Multiple FMRI patterns may be specified; with no patterns, display information on all installed packages in the image.

With -l, use the data available from locally installed packages.
This is the default.

With -r, retrieve the data from the repositories of the image's configured publishers. Note that you must specify one or more package patterns in this case.

If a command is terminated by the control operator `&', the shell executes the command asynchronously in a subshell. This is known as executing the command in the background. The shell does not wait for the command to finish, and the return status is 0 (true).

A: -n <svcname>
Uses this install service name instead of default service name.

B: -i <dhcp_ip_start>
Sets up a new DHCP server. The IP addresses, starting from dhcp_address_start, are set up.
D: -c <count_of_ipaddr>
Sets up a total number of IP addresses in the DHCP table equal to the value of the count_of_ipaddr. The first IP address is the value of dhcp_ip_start that is provided by the -i option.

F: -s <srcimage>
Specifies location of AI ISO image to use for setting up the install service.

<targetdir>

Required: Specifies location to set up net image.

A: Non-global zones can not utilize DHCP (neither client nor server). B (not C): By default, non-global zones will be configured with a shared IP functionality. What this means is that IP layer configuration and state is shared between the zone you're creating and the global zone. This usually implies both zones being on the same IP subnet for each given NIC.

Note: A zone is a virtual operating system abstraction that provides a protected environment in which applications run. The applications are protected from each other to provide software fault isolation. To ease the labor of managing multiple applications and their environments, they co-exist within one operating system instance, and are usually managed as one entity.

The original operating environment, before any zones are created, is also called the "global zone" to distinguish it from non-global zones, The global zone is the operating system instance.

Incorrect answer:
E: Exclusive-IP zones can use IPMP. IPMP is configured the same way in an exclusive-IP zone as it is on a system not using zones.
For shared-IP zones, IPMP can be configured in the global zone.
F: Full IP-level functionality is available in an exclusive-IP zone.
An exclusive-IP zone has its own IP-related state.
An exclusive-IP zone is assigned its own set of data-links using the zonecfg command. The zone is given a data-link name such as xge0, e1000g1, or bge32001, using the physical property of the net resource. The address property of the net resource is not set.

Note that the assigned data-link enables the snoop command to be used.

The dladm command can be used with the show-linkprop subcommand to show the assignment of data-links to running exclusive-IP zones.

Boot
With this form, boot loads and executes the program specified by the default boot arguments from the default boot device

Note: boot has the following general format:
boot [device-specifier] [arguments]
where device-specifier and arguments are optional.

Which Solaris release you are running on your system can be determined using the following command:

cat /etc/release

This will tell you which release you are running and when it was released. The more recent your system, the more info is contained in this file.

Example:
# cat /etc/release
Oracle Solaris 10 8/11 s10s_u10wos_17b SPARC
Copyright (c) 1983, 2011, Oracle and/or its affiliates. All rights reserved.
Assembled 23 August 2011

zonecfg info
Display information about the current configuration. If resource-type is specified, displays only information about resources of the relevant type. If any property-name value pairs are specified, displays only information about resources meeting the given criteria. In the resource scope, any arguments are ignored, and info displays information about the resource which is currently being added or modified.

Note:
zonecfg -z zonename. Specify the name of a zone. Zone names are case sensitive. Zone names must begin with an alphanumeric character and can contain alphanumeric characters, the underscore (_) the hyphen (-), and the dot (.). The name global and all names beginning with SUNW are reserved and cannot be used.

Incorrect answer:
A: The zoneadm utility is used to administer system zones. A zone is an application container that is maintained by the operating system runtime. list option: Display the name of the current zones, or the specified zone if indicated.
B: No such command.
D: no such options zonecfg -icv

A: An automated installation of a client over the network consists of the following high-level steps: Step 1. The client system boots over the network and gets its network configuration and the location of the install server from the DHCP server. Step 2: The install server provides a boot image to the client.
Etc.
D: If two client machines need to be installed with the same version of the Oracle Solaris 11 OS but need to be installed differently in other ways, then create two AI manifests for the AI install service. The different AI manifests can specify different packages to install or a different slice as the install target, for example.

Installing a ZFS Root Pool
The installer searches for a disk based on a recommended size of approximately 13 GB.

C: The Group ID (GID) field contains the group's numerical ID. GIDs can be assigned whole numbers between 100 and 60000.
D: Group names contain only lowercase characters and numbers.

A ZFS reservation is an allocation of disk space from the pool that is guaranteed to be available to a dataset. As such, you cannot reserve disk space for a dataset if that space is not currently available in the pool. The total amount of all outstanding, unconsumed reservations cannot exceed the amount of unused disk space in the pool. ZFS reservations can be set and displayed by using the zfs set and zfs get commands. For example:

# zfs set reservation=5G tank/home/bill
# zfs get reservation tank/home/bill
NAME PROPERTY VALUE SOURCE
tank/home/bill reservation 5G local

http://docs.oracle.com/cd/E23823_01/html/819-5461/ghzvz.html

On POSIX-compliant platforms, SIGTERM is the signal sent to a process to request its termination. The symbolic constant for SIGTERM is defined in the header file signal.h. Symbolic signal names are used because signal numbers can vary across platforms, however on the vast majority of systems, SIGTERM is
signal #15.

SIGTERM is the default signal sent to a process by the kill or killall commands. It causes the termination of a process, but unlike the SIGKILL signal, it can be caught and interpreted (or ignored) by the process.
Therefore, SIGTERM is akin to asking a process to terminate nicely, allowing cleanup and closure of files.
For this reason, on many Unix systems during shutdown, init issues SIGTERM to all processes that are not essential to powering off, waits a few seconds, and then issues SIGKILL to forcibly terminate any such processes that remain.

First create a virtual switch, then create a virtual network interface.

The host he is trying to connect to (oracle) is not running the required service (ssh).

This example shows how to display the default root crontab file.

$ suPassword:
# crontab -l
#ident "@(#)root 1.19 98/07/06 SMI" /* SVr4.0 1.1.3.1 */ #
# The root crontab should be used to perform accounting data collection.
#
#
10 3 * * * /usr/sbin/logadm 15 3 * * 0 /usr/lib/fs/nfs/nfsfind
30 3 * * * [ -x /usr/lib/gss/gsscred_clean ] && /usr/lib/gss/gsscred_clean #10 3 * * * /usr/lib/krb5/
kprop_script ___slave_kdcs___

B: By carrying SCSI commands over IP networks, the iSCSI protocol enables you to access block devices from across the network as if they were connected to the local system. COMSTAR provides an easier way to manage these iSCSI target devices.
D: Common Multiprotocol SCSI TARget, or COMSTAR, a software framework that enables you to convert any Oracle Solaris 11 host into a SCSI target device that can be accessed over a storage network by initiator hosts.
E: One IP port can handle multiple iSCSI target devices.

A: the pgk list command display a list of packages in the current image, including state and other information. By default, package variants for a different architecture or zone type are excluded.
D: pkginfo displays information about software packages that are installed on the system (with the first synopsis, with -l) or that reside on a particular device or directory (with the second synopsis, with -r).

Without options, pkginfo lists the primary category, package instance, and the names of all completely installed and partially installed packages. It displays one line for each package selected.

With -r, retrieve the data from the repositories of the image's configured publishers. Note that you must specify one or more package patterns in this case.

The ipadm delete-addr subcommand removes addresses from interfaces.

To remove an address from the IPMP group, type the following command:

# ipadm delete-addr addrobj
The addrobj uses the naming convention inder-interface/user-string.

Kill -9
Kill (terminates without cleanup)
Only works if issued by process owner or super user (root) The program cannot respond to this signal; it
must terminate

Note: Unix provides security mechanisms to prevent unauthorized users from killing other processes.
Essentially, for a process to send a signal to another, the owner of the signaling process must be the same as the owner of the receiving process or be the superuser.

ZFS quotas can be set and displayed by using the zfs set and zfs get commands. We can remove the quota restriction by setting to quota to none.

Check the physical connection.

As your machine gets started, it will need to know the mapping of some hostnames to IP addresses before DNS can be referenced. This mapping is kept in the /etc/hosts file. In the absence of a name server, any network program on your system consults this file to determine the IP address that corresponds to a host name.

By default, the passwd command assumes a minimum length of six characters. You can use the PASSLENGTH default in the /etc/defaults/passwd files to change that by setting the minimum number of characters that a user's password must contain to some other number.

An image is a location where packages can be installed.
An image can be one of three types:
* Full images are capable of providing a complete system.
* Partial images are linked to a full image (the parent image), but do not provide a complete system on
their own.
* User images contain only relocatable packages.